Issue #3476422: Add assertions to OpenTelemetryNodePagePerformanceTest::testNodePageWarmCache()
Closes #3476422
Add assertions to OpenTelemetryNodePagePerformanceTest::testNodePageWarmCache() to check cache gets/sets, database queries, and Javascript and CSS requests.
Use assertCountBetween() to compare bytes and allow some small changes in scripts and stylsheets before failing tests for improvements or regression.
Edited by Fabien Clément